Cheap flights from Idaho to Seattle from $102

In general, March is the cheapest month to fly from Idaho to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $59. If you don’t want to visit Seattle in March, then you should wait until December to fly from Idaho, when ticket prices are also cheap, with an average price of $69.

On average, the least expensive day to fly to Seattle from Idaho is on a Friday. momondo users have found tickets for Friday departures for as low as $358. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Idaho because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $566.

Flying to Seattle from Idaho in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $450 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $496. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Boise Air Term. Gowen Fld to Seattle/Tacoma Intl for the best Idaho - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $194 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Idaho for as low as $162 on momondo.

There are 4 cabin classes available to choose from on Idaho to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, Alaska Airlines, and Delta are the most popular carriers operating from Idaho to Seattle/Tacoma Intl

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Seattle from Idaho according to our data. Alaska Airlines is the first choice among our users, with 63% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

82 flights are operational daily from Idaho to Seattle as of May 2026. The most popular departure time for this route is 8:00AM, with 48% of flights per day taking off at noon.

The number of flights available between Idaho and Seattle is 577 per week as of May 2026. The most frequent departure day is Tue, with 17% of weekly flights leaving on this day.